ELECTRON MICROSCOPY

Sample

Mediator-RNA Polymerase II Pre-Initiation Complex

Specimen Preperation
Sample Aggregation State PARTICLE
Vitrification Instrument ?
Cryogen Name ETHANE
Sample Vitrification Details ?
3D Reconstruction
Reconstruction Method SINGLE PARTICLE
Number of Particles 170600
Reported Resolution (Å) 15.3
Resolution Method FSC 0.143 CUT-OFF
Other Details The structural interpretation of the Med-PIC complex, described in Robinson et. al. 2016 (Cell volume 166, issue 6, pages 1411-1422), was performed using models for the GTFs, TFIIF, TFIIH, and TFIIE derived from PDB entry 5FMF. In the current PDB submission, minor revisions to these GTF models have been performed subsequent to the reported structural interpretation to address issues in PDB entry 5FMF relating to sequence connectivity.
Refinement Type
Symmetry Type POINT
Map-Model Fitting and Refinement
ID
Refinement Space
Refinement Protocol
Refinement Target
Overall B Value
Fitting Procedure
Details
Data Acquisition
Detector Type GATAN ULTRASCAN 4000 (4k x 4k)
Electron Dose (electrons/Å2) 15
Imaging Experiment
Date of Experiment ?
Temprature (Kelvin)
Microscope Model FEI TECNAI 20
Minimum Defocus (nm) ?
Maximum Defocus (nm) ?
Minimum Tilt Angle (degrees) ?
Maximum Tilt Angle (degrees) ?
Nominal CS ?
Imaging Mode BRIGHT FIELD
Specimen Holder Model ?
Nominal Magnification ?
Calibrated Magnification ?
Source FIELD EMISSION GUN
Acceleration Voltage (kV) 200
Imaging Details ?
Image Processing
CTF Correction Type CTF Correction Details Number of Particles Selected Particle Selection Details
NONE ?